Table 2.

Claudin expression along the nephron

Nephron Segment	Claudins	Reference Nos.
Glomerulus	5, 6 (podocyte); 1 (parietal epithelium)	186, 189, 423
Proximal tubule	2, 10a, 17 (adult); 6, 9 (neonate)	1, 79, 122, 186, 373
Thin descending limb, upper segment	2	79, 186
Thin descending limb, lower segment	7, 8	211
Thin ascending limb	3, 4, 16, 19	14, 186
Thick ascending limb	3, 10a, 10b, 16, 18, 19	14, 122, 144, 186, 191, 324
Macula densa	10	373
Distal tubule, connecting tubule, collecting duct	7, 8, 10	7, 211, 373
Collecting duct	3, 4, 7, 8, 10a (cortical CD) or 10b (medullary CD), 14, 18	30, 122, 144, 186, 211, 373

CD, collecting duct.